Cotton-gin roller.



UNITED STATES PATEN T OEEIO.

`TOHN W. GRAVES, OF OVINGTON, TENNESSEE, ASSIGNOR TO INTERNATIONAL COTTON COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF SOUTH DAKOTA.

COTTON-GIN ROLLER.

Specification of Letters Patent.

Patented Deo. 24, 1907'.

Original application filed October l2, 1904. Serial No. 228,195. Divided and this application filed March 3, 1905. Seria] No. 248,232.

To all whom it may concern.'

Be it known that I, JOHN W. GRAVES, a citizen of the United States, and a resident of Covington, in the county of Tipton, State of Tennessee, have invented certain new and useful Improvements in Cotton-Gin Rollers, of which the following is a full, clear, and exact description.

This application is a division of my application filed October 12, 1904, Serial No. 228,195, and relates to certain improvements in cotton-gin rollers hereinafter set forth. v

Referring to the drawings forming part of this specification, Figure 1 is a transverse section of a portion of a cotton gin roller showing my improvements applied thereto. Eig. 2 is a face view of a portion of such roller, and Fig. 3 is a detail side view of one of the ginning teeth plates.

The reference numeral 1 designates the main gin cylinder, a small section only of which is illustrated; but which is fully set forth in my said original application Serial No. 228,195. Upon the face of said cylinder are located the alternate sets of ginning teeth and rubbing surfaces constituting my invention. Said teeth are formed integral with plates 2, as shown in Eig. 3 while between said series of teeth 4 are located the rubbing sections 3. Said plates are formed of suitable metal and are comparatively thin; while the rubbing sections are each composed of a considerable number of sheets of leather, as shown in Fig. 2 the latter being held in position by extending beneath the overhanging shoulders 9 of said plates. To lock said plates in position, they are each formed with two legs 7 straddling a bar 6 set slightly into the surface of the cylinder 1, as shown in Fig. 1. In a groove in one side of said bar and in corresponding spaces formed by the notch 7a in one of said legs 7, is inserted a rod 8 which, when withdrawn, permits of said plates removal, but when in place firmly locks the latter against displacement. Suitable bolts 5 secure said bars in place.

Between every adj oiningpair of plates 2 is placed a blank plate 2a, constructed in every particular like said plates 2 but without the combing teeth 4, their object being to separate said teeth from each other for a suitable space. These blanks are so located in every two following groups of teeth that the teeth in one group will come in the same diametrical plane with the blanks in the groups immediately preceding and following. By diametrical plane Imean to designate the same plane cutting the axis of the cylinder at right angles'. The obj ectof this is to insure that any seed cotton which mayv have partially escaped the teeth ofV one group owing to having come more or less between the teeth of two adjoining plates, may be sure to be met by the teeth of the following group. In other words, the seed cotton acted upon at one point by one set of teeth will be acted upon at another point by the next succeeding teeth, and so be more thoroughly denuded of its fiber, through this staggered arrangement of the said blanks.

I have discovered that the friction surfaces formed by the edges of the leather sheets 8 located in planes cutting the cylinders axis transversely, produce much better results than when the leather sheets extend either parallel with said axis, or more or less obliquely therewith. In the latter, or well known arrangements, the leather is more liable to lay over or be tipped more or less out of position. I also find that a ginning roller having its periphery composed of alternate sections of friction surfaces and combing, carding or abrading surfaces, accomplishes the best possible results, the alternate rubbing and combing actions following each other in quick .succession upon the seed cotton serving to more thoroughly denude the latter of its fiber.

What I claim as my invention and for which I desire Letters Patent is as follows, to wit;-

1. A main gin cylinder having bars fixed upon its periphery parallel with its axis, 'and combing plates bifurcated to iit upon said bars, in combination with rods located in grooves formed in said bars and notches in said plates. f

2. A cotton gin roller comprising a cylinder and friction and combing sections arranged alternately on the periphery of said cylinder, said combing sections having shoulders which are constructed to overhang the friction sections and interlock therewith for holding the same against outward movement on the cylinder.

3. The combination with a cylinder, of bars fixed to its surface, bifurcated plates straddling said bai's and having overhanging l vention, I have hereunto set my hand this shoulders, neans remoylably loeing said 21st day of January, 1905. plates to sai bars, and eather vs eets supported on edge upon said eyhnders surface JOHN W GRAVES" 5 and held in place by extending beneath said Witnesses:

shoulders. A. B. UPHAM, In testimony that I claim the foregoing in- W. L. WAITE. 

